KR20100076711A - Steering bogie for railway vehicles using yaw motion of the center pivot - Google Patents

Abstract

PURPOSE: A steering bogie vehicle using a center pivot yaw movement for a railway vehicle is provided to improve steering performance which is insufficient due to a magnetic steering method, to reduce lateral pressure between a wheel and a rail, and to reduce an angle of a rail and a wheel due to the radius of curvature. CONSTITUTION: A steering bogie vehicle(100) using a center pivot yaw movement for a railway vehicle comprises a steering device(60) which steers a railway vehicle by using the concavity direction displacement of the center pivot(18) generated in the driving of a railway vehicle and includes a driving part(20) transferring the yaw displacement created in the center pivot and a steering part(30) steering front/rearward wheel axles(12a,12b) by using the yaw displacement of the center pivot delivered through the driving part. The driving part includes a first and a second center pivot links(22a,22b) which are fixed on the center pivot and a first and a second connecting rods(24a,24b) which are respectively connected and installed on the first and the second center pivot links.

Description

Steering Bogie for Railway Vehicles using Yaw Motion of the Center Pivot}

The present invention relates to a steering wheel for a railroad car using a center pivot yaw motion, and more particularly, to radial steering of a railroad car by steering a railroad car by using a yaw direction displacement of a center pivot generated when driving a curved section. The present invention relates to a railway vehicle steering bogie using a center pivot yaw motion capable of following steering, reducing an attack angle between a rail and a wheel due to a curved radius, and reducing a lateral pressure between the wheel and a track.

In general, in the case of a bogie applied to a railway vehicle, the weight of the vehicle body is uniformly distributed on each wheel while supporting the weight of the vehicle body, and flowing freely with the vehicle body to smoothly run the railway vehicle. It is composed together.

The conventional railway vehicle bogie includes a front and rear wheelset consisting of wheels and axles, front and rear axle boxes with bearings mounted thereon so as to be rotatable while supporting journal portions at both ends of the axle, and seated on top of the axle box. A bogie frame fixed between the bogie frame and the axle box, the primary suspending device for primarily attenuating the vibration transmitted from the wheel, and a bogie mounted on the top center of the bogie frame. It is connected to a fixed fixed secondary suspension device for attenuating the vibration transmitted to the vehicle body and a center pivot (center pivot) is installed in the lower center of the bogie frame to transfer the traction force between the bogie and the vehicle body.

However, in the linear driving of a railway vehicle through the conventional bogie configured as described above, when the wheel disposed at the end of the axle travels at a high speed from the upper rail, the wheel is inclined from the flange and is zigzag in accordance with the change of the contact point between the step surface of the wheel and the rail surface. There was a disadvantage in that the driving stability due to the running of the straight line of the railroad car was reduced due to mutually tremendous vibration caused by the driving motion of the road.

In addition, when the curve of a railroad vehicle is driven by a conventional bogie, the steering amount of the bogie that can alleviate the excess centrifugal force and guide force generated between the wheel and the rail is not sufficient, so that the friction path between the flange of the wheel and the side of the rail In addition to high noise and vibration, there is a problem that the ride comfort for passengers is greatly reduced, and in addition, the wheel may be worn and the rail may be damaged, resulting in a large accident due to derailment of the vehicle. There was a problem.

Thus, in order to solve the above problems, as shown in the trolley 100 of FIG. 1, the steering apparatus 20 is installed between the front and rear axle boxes located on both sides of the trolley frame, which is the angle of the trolley. It consists of a link joint for forcibly steering the axle by using the curved part turning angle between the axle box and the body, but the steering device is very complicated in link structure that connects the axle and the bogie frame and the two axles. Not only it is difficult to install a suspension device such as a spring for damping vibration, but also there is a problem that the maintainability of the complicated structure of the steering device is inferior.

In addition, in order to solve these problems, as shown in the bogie 100 of FIG. As the distance between the shafts is reduced, the wheels are steered by inducing yaw movement of wheelsets. This configuration is self-steering and improves steering performance by torsion bar torsional stiffness rather than improvement of steering performance. The resistance is improved, the stability of the four-way movement is an additional function is more effective, there was a problem that the steering performance is lowered.

The present invention has been made to solve the above problems, and an object of the present invention is to follow the radial steering of the railway vehicle by steering the railway vehicle by using the yaw direction displacement of the center pivot generated when driving the curved section. Accordingly, the present invention provides a railway vehicle steering bogie using a center pivot yaw motion that minimizes the radius of curvature, the attack angle between the wheel and the rail, and reduces the lateral pressure between the wheel and the rail.

The present invention for achieving the above object,

A steering vehicle for a railway vehicle, characterized in that it comprises a steering device for steering the railway vehicle by using the yaw direction displacement of the center pivot generated when the railway vehicle runs.

In this case, the steering apparatus is characterized by consisting of a drive unit for transmitting the yaw direction displacement generated in the center pivot, and a steering unit for steering the front and rear wheel shaft by using the yaw direction displacement of the center pivot transmitted through the drive unit. .

The driving unit may include first and second center pivot links fixed to the center pivot and first and second connecting rods respectively connected to the first and second center pivot links.

The steering unit is characterized in that the Z-shaped link structure.

The steering unit may include first and second rotary arms connected to the driving unit, first and second front steering links connected to one end of the first and second rotary arms and coupled to the front axle box, It is characterized by consisting of the first and second rear steering link connected to the middle portion of the first and second rotary arms coupled to the rear axle box.

On the other hand, the first and the second rotary arm is characterized in that connected to the side frame of the bogie frame by a rotary joint.

In addition, the first and second front and rear steering link is characterized in that the spherical joints are installed in the front and rear axle box, respectively.

According to the steering vehicle for a railway vehicle using the center pivot yaw motion according to the present invention configured as described above, the radial steering of the railway vehicle by steering the railway vehicle by using the yaw displacement of the center pivot generated when the railway vehicle travels. By following this method, the steering performance of the conventional self-steering method can be improved and the lateral pressure between the wheels and the rails can be reduced, and the attack angle between the rails and the wheels due to the curved radius can be reduced. Has an excellent effect.

In addition, according to the present invention further has an effect that can significantly reduce the wear of the wheel, noise generation and track damage caused when the railway vehicle is running.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the steering wheel for the railway vehicle using the center pivot yaw motion according to the present invention.

3 is a bottom perspective view showing a steering wheel for a railroad car using a center pivot yaw motion according to the present invention, Figure 4 is a front view showing a steering wheel for a railroad car using a center pivot yaw motion according to the present invention, Figure 5a ), (b) is a plan view showing the steering principle of the steering wheel for the railway vehicle using the center pivot yaw motion according to the present invention, Figure 6 (a), (b) is a railway using the center pivot yaw motion according to the present invention FIG. 7 is a diagram illustrating a change in distance from left and right wheels and a yaw angle change in front and rear wheels during driving of a curved section of a vehicle steering bogie. FIG. to be.

The present invention steers a railroad vehicle by using a yaw direction displacement of a center pivot 18 generated when driving a curved section, thereby following radial steering during a curved section of a railway vehicle, and between a rail and a wheel due to a curved radius. It relates to a railway vehicle steering wheel (100) using a center pivot yaw motion that can reduce the attack angle and reduce the lateral pressure between the wheel and the track, the configuration is largely the bogie frame (10), Steering bogie 100 for railway vehicles, comprising front and rear wheelsets 12a and 12b, front and rear axle boxes 14a and 14b, bolsters 16 and center pivots 18. In order to steer the steering apparatus 60 for steering the railway vehicle by using the yaw direction displacement of the center pivot 18 generated during the curved section of the railway vehicle is characterized in that it is included.

In more detail, the railway vehicle steering wheel 100 includes a front wheel and rear wheels 12a and 12b formed of a wheel 11 and an axle, and bearings are mounted to be rotatable while supporting the journals at both ends of the axle. Between the front and rear axle boxes 14a and 14b, the bogie frame 10 that is seated and fixed to the upper ends of the axle boxes 14a and 14b, and between the bogie frame 10 and the axle boxes 14a and 14b. A suspension device (not shown) installed to attenuate the vibration transmitted from the wheel 11, and a lower portion of the bolster (or the vehicle body) 16 and the bolster (or the vehicle body) 16, which is disposed between the bogie and the vehicle body. It includes a center pivot (18) for transmitting the traction force, when the railway vehicle travels in a curved section, yaw displacement occurs between the bolster (or body) 16 and the bogie, and thus Center blood installed at the bottom center of the bolster (or body) 16 The bot 18 also causes yaw displacement. Therefore, the steering apparatus 60 which steers the front and rear wheel shafts 12a and 12b by using the yaw direction displacement of the center pivot 18 is installed under the bogie frame 10.

At this time, the steering device 60 is composed of a drive unit 20 and a steering unit 30, as shown in Figure 3, the drive unit 20 is generated in the center pivot 18 when driving the curved section of the railway vehicle The steering unit 30 serves to transfer the front and rear wheel shafts 12a and 12b using the yaw direction displacement of the center pivot 18 transmitted through the driving unit 20. It is to steer.

In more detail, the driving unit 20 is the first and second center pivot links 22a fixed to both sides of the center pivot 18 in the horizontal direction, ie, in the transverse direction below the bogie frame 10. 22b and first and second connecting rods 24a and 24b connected to the first and second center pivot links 22a and 22b, respectively, the first and second center pivot links 22a. 22b transmits the yaw direction displacement generated at the center pivot 18 to the first and second connecting rods 24a and 24b, and the first and second connecting rods 24a and 24b are used as the first and second 2 serves to transmit the yaw direction displacement of the center pivot 18 received from the center pivot links 22a and 22b to the steering unit 30 to be described later.

Next, the steering unit 30 uses the yaw direction displacement of the center pivot 18 received through the first and second connecting rods 24a and 24b of the driving unit 20 to front and rear wheel shafts 12a and 12b. ), Which is composed of Z-shaped link structure for more efficient and stable steering.

In more detail, the steering unit 30 is composed of a rotary arm 32, the front steering link 34 and the rear steering link 36, the first rotation arm 32 of the drive unit 20 And a center pivot 18 which is composed of first and second rotating arms 32a and 32b connected to and installed on the second connecting rods 24a and 24b and is transmitted from the first and second connecting rods 24a and 24b. It serves to transfer the directional displacement to the front and rear steering links (34, 36), the front steering link 34 is the one end is coupled to the end of the first and second rotary arms (32a, 32b) The center pivot 18 generated when driving a curved section of a railway vehicle by combining the first and second front steering links 34a and 34b with the other end coupled to the front axle box 14a installed at both ends of the front wheelset 12a, respectively. ) Is a function of steering the front wheelset (12a) by receiving the yaw direction displacement from the first and second rotary arms (32a, 32b), the rear steering ring The shaft 36 is composed of first and second rear steering links 36a and 36b coupled to an intermediate portion of the first and second rotary arms 32a and 32b, and the other end thereof is the rear wheel shaft 12b. Is coupled to the rear axle box 14b installed at both ends of the crankshaft and receives the yaw direction displacement of the center pivot 18 generated during the curved section of the railway vehicle from the first and second rotary arms 32a and 32b. It serves to steer the wheelset 12b.

At this time, the first and second rotary arms 32a and 32b are connected to each other by a revolute joint 50 under the side frame 15 of the bogie frame 10, as shown in FIG. It is preferable that the first and second rotary arms 32a and 32b be connected to each other when the yaw displacement of the center pivot 18 is transmitted from the first and second connecting rods 24a and 24b. By rotating around the rotary joint 50, the first and second front and rear steering links 34a, 34b, 36a, and 36b of the Z-shaped link structure make the front and rear wheels 12a and 12b easier. This is because steering can be performed stably.

In addition, the first and second front and rear steering links 34a, 34b, 36a, and 36b may be disposed in front and rear axle boxes, respectively, as shown in FIGS. 3 and 4 in consideration of vertical displacement of the center pivot 18. It is preferable to be connected to the spherical joint 40 to the 14a and 14b, because the first and second rotary arms 32a and 32b are converted to rotational motion through the rotary joint 50. The trolley 100 by freely transmitting the motion of the front and rear wheels 12a and 12b using the spherical joint 40 from the first and second front and rear steering links 34a, 34b, 36a, and 36b. This is because the steering performance can be improved.

Hereinafter, with reference to the accompanying drawings will be described in detail the operation process of the steering wheel for railway vehicles using the center pivot yaw motion according to the present invention.

First, when the railway vehicle travels in a straight section, since the yaw direction displacement does not occur between the bolster (or the vehicle body) 16 and the bogie 100, as shown in FIG. 5A, the driving unit of the steering apparatus 60. 20 and the steering unit 30 is in a state of not operating.

Next, when the railway vehicle travels the curved section (only the curved section bent to the left on the basis of the traveling direction for convenience), as shown in FIG. 5B, the bolster (or the vehicle body) 16 ) And the yaw direction displacement occurs in the clockwise direction between the bogie 100, in which the center pivot 18 connected to the bolster 16 is rotated in the clockwise direction. The rotation of the center pivot 18 may be performed via the first and second connecting rods 24a and 24b through the first and second center pivot links 22a and 22b fixed to the center pivot 18. It is transmitted to the first and second rotary arms 32a and 32b, wherein the first rotary arm 32a installed on the right side of the center pivot 18 is connected to the side frame 15 of the bogie frame 10. It rotates in a counterclockwise direction about the center of 50, and the first front and rear steering links 34a and 36a are opened by the counterclockwise rotation of the first rotary arm 32a, and the right front and rear sides are opened. The distance between the wheels 12a and 12b is steered so that the second rotation arm 32b installed on the left side of the center pivot 18 is similarly connected to the side frame 15 of the bogie frame 10. It rotates in the counterclockwise direction about the joint 50 and is connected to the second rotary arm 32b before and after the second. By so narrow that the steering link (34b, 36b) around the left, to the steering so as to narrow the distance between the rear wheel shaft (12a, 12b).

As shown in (a) and (b) of FIG. 6 through the above process, the distance change between the left and right wheels is generated, and the yaw angle of the front and rear wheels 12a and 12b is changed. The rear wheels 12a, 12b are directed to radial steering towards the center of the radius of the curve (see Fig. 7), thereby reducing the lateral pressure between the wheels 11 and the rails, It is possible to reduce the attack angle between the wheels.

As described above, according to the steering wheel for a railway vehicle using the center pivot yaw motion according to the present invention, the radial steering of the railway vehicle by steering the railway vehicle by using the yaw direction displacement of the center pivot generated when the railway vehicle is traveling in a curved section. By following), it is possible to improve the insufficient steering performance of the conventional self-steering method, and at the same time reduce the lateral pressure between the wheel and the rail, thereby reducing the attack angle between the rail and the wheel 11 due to the radius of the curve. There are various advantages such as that can be reduced.

Although the above embodiments have been described with respect to the most preferred examples of the present invention, it is not limited to the above embodiments, and it will be apparent to those skilled in the art that various modifications are possible without departing from the technical spirit of the present invention.

The present invention relates to a steering wheel for a railroad car using a center pivot yaw motion, and more particularly, to radial steering of a railroad car by steering a railroad car by using a yaw direction displacement of a center pivot generated when driving a curved section. The present invention relates to a railway vehicle steering bogie using a center pivot yaw motion capable of following steering, reducing an attack angle between a rail and a wheel due to a curved radius, and reducing a lateral pressure between the wheel and a track.

1 is a perspective view showing a conventional steering wheel for railway vehicles.

Figure 2 is a perspective view showing another embodiment of the conventional railway vehicle steering wheel.

3 is a bottom perspective view showing a steering vehicle for a railway vehicle using a center pivot yaw motion according to the present invention.

Figure 4 is a front view showing a steering wheel for a railway vehicle using the center pivot yaw motion according to the present invention.

Figure 5 (a), (b) is a plan view showing the steering principle of the steering wheel for the railway vehicle using the center pivot yaw motion according to the present invention.

Figure 6 (a), (b) is a view showing the distance change of the left and right wheels and the yaw angle of the front and rear wheels during the curve section driving of the railway vehicle steering bogie using the center pivot yaw motion according to the present invention.

7 is a view conceptually showing a radial steering of a steering wheel for a railway vehicle using a center pivot yaw motion according to the present invention.

Explanation of symbols on the main parts of the drawings

10: bogie frame 11: wheel

12a: front wheelset 12b: rear wheelset

14a: front axle box 14b: rear axle box

15: side frame 16: bolster

18: center pivot 20: drive unit

22a, 22b: first and second center pivot links

24a, 24b: first and second connecting rods

30: steering portion 32: rotary arm

34: front steering link 36: rear steering link

40: spherical joint 50: rotary joint

60: steering device 100: (steering) bogie

Claims (7)

In the steering trolley for railway vehicles, A steering wheel for a railway vehicle using a center pivot yaw motion, characterized in that it comprises a steering device for steering the railway vehicle by using the yaw direction displacement of the center pivot generated when the railway vehicle travels. The method of claim 1, The steering apparatus includes a driving unit which transmits a yaw direction displacement generated by the center pivot, and a steering unit which steers the front and rear wheel shafts by using the yaw direction displacement of the center pivot transmitted through the driving unit. Steering bogie for railroad cars using yaw motion. 3. The method of claim 2, The drive unit includes a first pivot center pivot link fixed to the center pivot and a first pivot connection rod configured to connect to the first center pivot link, respectively. Steering bogie for railroad cars using motion. 3. The method of claim 2, Steering bogie for railway vehicles using the center pivot yaw motion, characterized in that the steering portion made of a Z-shaped link structure. The method of claim 4, wherein The steering unit includes first and second rotary arms connected to the driving unit, first and second front steering links connected to one end of the first and second rotary arms and coupled to the front axle box, and the first Steering bogie for railway vehicles using a center pivot yaw motion, characterized in that consisting of the first and second rear steering link coupled to the middle of the first and second rotary arms and coupled to the rear axle box. The method of claim 5, The first and second rotary arms are connected to the side frame of the bogie frame by a rotary joint, characterized in that the steering trolley for railway vehicles using a center pivot yaw motion. The method of claim 5, The first and second front and rear steering links are connected to the front and rear axle boxes by spherical joints, respectively.

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